[PM-13999] Show estimated tax for taxable countries (#5077)

src/Core/Billing/Models/Api/Requests/Accounts/PreviewIndividualInvoiceRequestModel.cs

@@ -0,0 +1,18 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Bit.Core.Billing.Models.Api.Requests.Accounts;
+
+public class PreviewIndividualInvoiceRequestBody
+{
+    [Required]
+    public PasswordManagerRequestModel PasswordManager { get; set; }
+
+    [Required]
+    public TaxInformationRequestModel TaxInformation { get; set; }
+}
+
+public class PasswordManagerRequestModel
+{
+    [Range(0, int.MaxValue)]
+    public int AdditionalStorage { get; set; }
+}

src/Core/Billing/Models/Api/Requests/Organizations/PreviewOrganizationInvoiceRequestModel.cs

@@ -0,0 +1,37 @@
+using System.ComponentModel.DataAnnotations;
+using Bit.Core.Billing.Enums;
+
+namespace Bit.Core.Billing.Models.Api.Requests.Organizations;
+
+public class PreviewOrganizationInvoiceRequestBody
+{
+    public Guid OrganizationId { get; set; }
+
+    [Required]
+    public PasswordManagerRequestModel PasswordManager { get; set; }
+
+    public SecretsManagerRequestModel SecretsManager { get; set; }
+
+    [Required]
+    public TaxInformationRequestModel TaxInformation { get; set; }
+}
+
+public class PasswordManagerRequestModel
+{
+    public PlanType Plan { get; set; }
+
+    [Range(0, int.MaxValue)]
+    public int Seats { get; set; }
+
+    [Range(0, int.MaxValue)]
+    public int AdditionalStorage { get; set; }
+}
+
+public class SecretsManagerRequestModel
+{
+    [Range(0, int.MaxValue)]
+    public int Seats { get; set; }
+
+    [Range(0, int.MaxValue)]
+    public int AdditionalMachineAccounts { get; set; }
+}

src/Core/Billing/Models/Api/Requests/TaxInformationRequestModel.cs

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+using System.ComponentModel.DataAnnotations;
+
+namespace Bit.Core.Billing.Models.Api.Requests;
+
+public class TaxInformationRequestModel
+{
+    [Length(2, 2), Required]
+    public string Country { get; set; }
+
+    [Required]
+    public string PostalCode { get; set; }
+
+    public string TaxId { get; set; }
+}

src/Core/Billing/Models/Api/Responses/PreviewInvoiceResponseModel.cs

@@ -0,0 +1,7 @@
+namespace Bit.Core.Billing.Models.Api.Responses;
+
+public record PreviewInvoiceResponseModel(
+    decimal EffectiveTaxRate,
+    decimal TaxableBaseAmount,
+    decimal TaxAmount,
+    decimal TotalAmount);